SHiPGeometry::NeutrinoDetectorFactory Class Reference

Factory for the Scattering and Neutrino Detector (SND). More...

#include <NeutrinoDetectorFactory.h>

Public Member Functions
	NeutrinoDetectorFactory (SHiPMaterials &materials)
	Construct the factory against the shared materials catalogue.
	~NeutrinoDetectorFactory ()=default
	Defaulted destructor.
GeoPhysVol *	build ()
	Build the SND geometry; returns the air container.

Detailed Description

Factory for the Scattering and Neutrino Detector (SND).

Builds the SND as a single air container holding three sub-detectors in sequence along the beam (upstream → downstream):

1. Veto — an upstream PVT scintillator-bar station: three planes of seven bars (two horizontal, staggered in Y; one vertical).
2. NuTarget — a silicon/tungsten sampling target: 120 layers, each a tungsten absorber plate followed by an X and a Y silicon tracking plane (400 mm reference plate, 11.3 mm pitch).
3. HCAL — a hadronic calorimeter: three transverse sections (40/50/60 cm), 14 layers each; every layer is an iron absorber, an X and a Y scintillating-fibre plane, and a polystyrene tile grid.

The geometry follows the repo factory idiom (calorimeter / straw tracker): a /SHiP/neutrino_detector air container filled with hierarchically named GeoPhysVol children that reuse shared GeoLogVols; sensitive-detector assignment is done downstream by name.

Each 0.5 mm scintillating-fibre plane is built from its individual fibres, two staggered sub-layers of 0.25 mm fibres. To keep the node count bounded, the O(300k) identical fibres are not placed one node at a time: a single shared fibre GeoPhysVol is multiply placed per sub-layer via a GeoSerialTransformer, so each plane costs O(1) tree nodes regardless of fibre count. The X/Y plane names are preserved for readout.

The container is a box approximation of the SND envelope (subsystem_envelopes.csv: z 26.40–31.50 m WARM, half-width/height up to 0.40 m); placement is handled by SHiPGeometry.

Constructor & Destructor Documentation

NeutrinoDetectorFactory()

SHiPGeometry::NeutrinoDetectorFactory::NeutrinoDetectorFactory ( SHiPMaterials &  materials )

explicit

Construct the factory against the shared materials catalogue.

~NeutrinoDetectorFactory()

SHiPGeometry::NeutrinoDetectorFactory::~NeutrinoDetectorFactory ( )

default

Defaulted destructor.

Member Function Documentation

build()

GeoPhysVol * SHiPGeometry::NeutrinoDetectorFactory::build

(

)

Build the SND geometry; returns the air container.

Resolve materials, create the air container, lay out the veto, target and HCAL in beam order (content centred in the container), and return it.

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The documentation for this class was generated from the following files:

• subsystems/NeutrinoDetector/include/NeutrinoDetector/NeutrinoDetectorFactory.h
• subsystems/NeutrinoDetector/src/NeutrinoDetectorFactory.cpp